I'm in the same exact boat. I too have this problem of not being able to rip any blu-rays after upgrading to 1.15, and then again after reverting to 1.14.7 like OP. I also had a spare Asus BW-16D1HT on hand and swapped it (3.02 firmware), with no luck. I'm on Win 1903. I'm at a loss how to proceed f...